A method for adjusting an ambient light sensor includes: acquiring a color temperature of light received by the ambient light sensor; and adjusting an output light intensity of the ambient light sensor according to the color temperature to enable output light intensities of the ambient light sensor to be consistent under received light with different color temperatures. The ambient light sensor includes: an acquiring device, configured to acquire a color temperature of light received by the ambient light sensor; and an adjuster, configured to adjust an output light intensity of the ambient light sensor according to the color temperature acquired by the acquiring device to enable output light intensities of the ambient light sensor to be consistent under received light with different color temperatures.
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1. A method for adjusting an ambient light sensor, the method comprising: acquiring a color temperature of an incoming light received by the ambient light sensor, the color temperature of the received light measuring a color characteristic of the incoming light in Kelvins; in response to the incoming light having been received, calculating an intensity of a light output by the ambient light sensor; adjusting the calculated intensity of the output light of the ambient light sensor according to the color temperature of the incoming light for achieving consistency with other incoming lights having different color temperatures as received by the ambient light sensor; and communicating the intensity of the light output by the ambient light sensor to a brightness adjustment apparatus to enable the brightness adjustment apparatus to effectuate a brightness adjustment of a display device based on the intensity of the light output by the ambient light sensor.
A method for adjusting an ambient light sensor in electronic devices involves measuring the color temperature (in Kelvins) of incoming light. Based on this color temperature, the method calculates and adjusts the intensity of the light output by the ambient light sensor. This adjustment ensures the sensor produces consistent output light intensities, even when exposed to different color temperatures. The adjusted light intensity is then communicated to a brightness adjustment mechanism to modify the display brightness accordingly. This allows the display to adapt to varying ambient light conditions, providing a more comfortable viewing experience.
2. The method for adjusting an ambient light sensor according to claim 1 , wherein the ambient light sensor comprises: a first photodiode that is sensitive to visible light and infrared light, and a second photodiode that is sensitive only to infrared light, and wherein the method further comprises: acquiring a light spectral curve of the incoming light received by the ambient light sensor, a light sensitivity curve of the first photodiode and a light sensitivity curve of the second photodiode; integrating the light spectral curve of the incoming light received by the ambient light sensor and the light sensitivity curve of the first photodiode to obtain a first data parameter Cdata, and integrating the light spectral curve of the incoming light received by the ambient light sensor and the light sensitivity curve of the second photodiode to obtain a second data parameter Irdata, and acquiring a parameter ratio between the Cdata and Irdata as C data Ir data , wherein the parameter ratio C data Ir data is used to reflect the color temperature of the light received by the ambient light sensor; and, wherein the intensity adjustment of the output light of the ambient light sensor is based on the parameter ratio C data Ir data .
The ambient light sensor adjustment method described previously is further refined with a sensor containing two photodiodes: one sensitive to visible and infrared light, and another only to infrared light. The method involves acquiring a light spectral curve of the incoming light, along with the sensitivity curves of each photodiode. It then integrates these curves to obtain two data parameters, Cdata and Irdata, corresponding to the visible/infrared and infrared photodiodes, respectively. The ratio Cdata/Irdata reflects the color temperature. The adjustment of the sensor's output light intensity is then based on this Cdata/Irdata ratio, allowing for a more accurate and responsive ambient light adjustment.
3. The method for adjusting an ambient light sensor according to claim 2 , wherein: the output light intensity of the ambient light sensor is adjusted according to the following output light intensity calculation formula: Lux=K×MAX [(Cdata−B×Irdata),(C×Cdata−D×Irdata),0], wherein Lux is an output light intensity of the ambient light sensor; K, B, C and D are coefficients that are used to enable the output light intensity of the ambient light sensor to be close to a light intensity perceived by human eyes; and MAX is an operation symbol for obtaining a maximum value; and adjusting the intensity of the output light of the ambient light sensor according to the color temperature of the incoming light comprises: adjusting a K value in the output light intensity calculation formula according to different parameter ratios C data Ir data to enable the output light intensities Lux of the ambient light sensor to be consistent for different parameter ratios C data Ir data .
Building on the previous description of the ambient light sensor adjustment method that uses Cdata and Irdata values, the output light intensity (Lux) is calculated using the formula: Lux = K * MAX[(Cdata - B * Irdata), (C * Cdata - D * Irdata), 0]. Here, K, B, C, and D are coefficients designed to align the sensor's output with human perception. The core of the adjustment lies in modifying the 'K' value in this formula based on different Cdata/Irdata ratios. This adaptive 'K' adjustment ensures that the ambient light sensor provides consistent Lux output across various color temperatures, resulting in a more stable and user-friendly display brightness adjustment.
4. The method for adjusting an ambient light sensor according to claim 3 , wherein: adjusting the K value in the output light intensity calculation formula according to different parameter ratios C data Ir data to enable the output light intensities Lux of the ambient light sensor to be consistent for different parameter ratios Cdata Irdata comprises: adjusting the K value in the output light intensity calculation formula according to the different parameter ratios Cdata Irdata to enable the output light intensities of the ambient light sensor to be equal to intensities of the light received by the ambient light sensor for the parameter ratios Cdata Irdata .
Continuing from the ambient light sensor method, the K value (scaling factor) in the light output calculation is adjusted based on the Cdata/Irdata ratio so that the output light intensity (Lux) of the sensor matches the actual intensity of the incoming light. This matching occurs for various Cdata/Irdata ratios. This process effectively calibrates the sensor, ensuring that its output accurately reflects the ambient light level, regardless of the light's color temperature.
5. An ambient light sensor, comprising: an acquiring device, configured to a color temperature of an incoming light received by the ambient light sensor, the color temperature of the received light measuring a color characteristic of the incoming light in Kelvins; an output light intensity calculating device configured to calculate an intensity of a light output by the ambient light sensor; and an adjusting device, configured to adjust the calculated intensity of the output light of the ambient light sensor according to the color temperature of the incoming light for achieving consistency with other incoming lights having different color temperatures as received by the ambient light sensor; and, wherein the ambient light sensor is configured to communicate the intensity of the light output by the ambient light sensor to a brightness adjustment apparatus to enable the brightness adjustment apparatus to effectuate a brightness adjustment of a display device based on the intensity of the light output by the ambient light sensor.
An ambient light sensor comprises an acquiring device that measures the color temperature (in Kelvins) of incoming light. It also has an output light intensity calculating device. The sensor then has an adjusting device that modifies the calculated output light intensity based on the color temperature. This aims to provide a consistent light intensity output regardless of the color temperature of the ambient light. The ambient light sensor sends this adjusted light intensity to a brightness adjustment apparatus, allowing the display brightness to be adjusted based on accurate ambient light readings.
6. The ambient light sensor according to claim 5 , further comprising: a first photodiode sensitive to visible light and infrared light, the first photodiode being operatively connected to the acquiring device; a second photodiode sensitive only to infrared light, the second photodiode being operatively connected to the acquiring device; and wherein the acquiring device comprises: a sub-acquiring device, configured to acquire a light spectral curve of the incoming light received by the ambient light sensor, a light sensitivity curve of the first photodiode and a light sensitivity curve of the second photodiode, an integrator, configured to integrate the incoming light spectral curve of the light received by the ambient light sensor and the light sensitivity curve of the first photodiode to obtain a first data parameter Cdata, and integrate the incoming light spectral curve of the light received by the ambient light sensor and the light sensitivity curve of the second photodiode to obtain a second data parameter Irdata, and a parameter ratio calculator, configured to acquire a parameter ratio between the Cdata and Irdata as Cdata Irdata , wherein the parameter ratio Cdata Irdata is used to reflect the color temperature of the light received by the ambient light sensor; and, wherein the intensity adjustment of the output light of the ambient light sensor by the adjusting device is based on the parameter ratio C data Ir data .
This ambient light sensor contains a first photodiode sensitive to visible and infrared light, and a second photodiode sensitive only to infrared light. The acquiring device obtains a light spectral curve and sensitivity curves for both photodiodes. An integrator calculates parameters Cdata (from the first photodiode) and Irdata (from the second photodiode). A parameter ratio calculator computes Cdata/Irdata, representing the color temperature. The adjusting device modifies the sensor's output intensity based on this Cdata/Irdata ratio. This setup improves color temperature sensitivity, allowing for more precise brightness adjustments than sensors using single photodiodes.
7. The ambient light sensor according to claim 6 , wherein: the output light intensity calculating device is further, configured to calculate the output light intensity according to an output light intensity calculation formula comprising: Lux=K×MAX [(Cdata−B×Irdata),(C×Cdata−D×Irdata),0], wherein Lux is an output light intensity of the ambient light sensor; K, B, C and D are coefficients that are used to enable the output light intensity of the ambient light sensor to be close to a light intensity perceived by human eyes; and MAX is an operation symbol for obtaining a maximum value; and wherein the adjusting device is configured to adjust a K value in the output light intensity calculation formula according to different parameter ratios Cdata Irdata to enable the output light intensities Lux of the ambient light sensor to be consistent for different parameter ratios Cdata Irdata .
The output light intensity calculating device calculates the output light intensity (Lux) using: Lux = K * MAX[(Cdata - B * Irdata), (C * Cdata - D * Irdata), 0], where K, B, C, and D are coefficients related to human vision. The adjusting device changes the K value based on the Cdata/Irdata ratio. Modifying K ensures consistent Lux output, even under different color temperatures. This results in a more stable and accurate ambient light sensing for display adjustment. It builds on the two photodiode color temperature sensing from the previous description.
8. The ambient light sensor according to claim 7 , wherein the adjusting device is configured to adjust the K value in the output light intensity calculation formula according to the different parameter ratios Cdata Irdata to enable the output light intensities of the ambient light sensor to be equal to intensities of the light received by the ambient light sensor for the parameter ratios Cdata Irdata .
Further refinement of the ambient light sensor involves adjusting the K value so that the sensor's output light intensities match the actual intensities of the incoming light for each Cdata/Irdata ratio. This adjustment ensures the output corresponds directly to the perceived light level and is an improved calibration of the ambient light sensor described previously.
9. An electronic product, comprising: a display apparatus; a display brightness adjusting apparatus connected to the display apparatus and an ambient light sensor, wherein the ambient light sensor is connected to the display brightness adjusting apparatus; and wherein the ambient light sensor comprises: an acquiring device, configured to a color temperature of an incoming light received by the ambient light sensor, the color temperature of the received light measuring a color characteristic of the incoming light in Kelvins; an output light intensity calculating device configured to calculate an intensity of a light output by the ambient light sensor; and an adjusting device, configured to adjust the calculated intensity of the output light of the ambient light sensor according to the color temperature of the incoming light for achieving consistency with other incoming lights having different color temperatures as received by the ambient light sensor; and, wherein the ambient light sensor is configured to communicate the intensity of the light output by the ambient light sensor to a brightness adjustment apparatus to enable the brightness adjustment apparatus to effectuate a brightness adjustment of a display device based on the intensity of the light output by the ambient light sensor.
An electronic product includes a display, a display brightness adjuster, and an ambient light sensor. The ambient light sensor measures the color temperature (in Kelvins) of incoming light. It calculates and adjusts the output light intensity based on this color temperature, maintaining consistent output under varying light conditions. This adjusted light intensity is sent to the brightness adjustment apparatus to modify the display brightness. The display adjusts based on the processed ambient light information received from the sensor, enhancing user experience.
10. The electronic product according to claim 9 , wherein the ambient light sensor further comprises: a first photodiode that is sensitive to visible light and infrared light, the first photodiode being operatively connected to the acquiring device; a second photodiode that is sensitive only to infrared light, the second photodiode being operatively connected to the acquiring device; and the acquiring device comprises: a sub-acquiring device, configured to acquire a light spectral curve of the incoming light received by the ambient light sensor, a light sensitivity curve of the first photodiode and a light sensitivity curve of the second photodiode, an integrator, configured to integrate the incoming light spectral curve of the light received by the ambient light sensor and the light sensitivity curve of the first photodiode to obtain a first data parameter Cdata, and integrate the incoming light spectral curve of the light received by the ambient light sensor and the light sensitivity curve of the second photodiode to obtain a second data parameter Irdata, and a parameter ratio calculator, configured to acquire a parameter ratio between the Cdata and Irdata as Cdata Irdata , wherein the parameter ratio Cdata Irdata is used to reflect the color temperature of the light received by the ambient light sensor; and, wherein the intensity adjustment of the output light of the ambient light sensor by the adjusting device is based on the parameter ratio C data Ir data .
In the electronic product, the ambient light sensor includes two photodiodes: one for visible/infrared and one for infrared. The acquiring device measures the light spectral curve and photodiode sensitivity curves. It then calculates Cdata and Irdata parameters and their ratio (Cdata/Irdata) to determine color temperature. The intensity adjustment is then based on the Cdata/Irdata ratio. This improves the sensor's ability to accurately gauge ambient light conditions for effective display brightness control.
11. The electronic product according to claim 10 , wherein the ambient light sensor further comprises: the output light intensity calculating device is further, configured to calculate the output light intensity according to an output light intensity calculation formula comprising: Lux=K×MAX [(Cdata−B×Irdata),(C×Cdata−D×Irdata),0], wherein Lux is an output light intensity of the ambient light sensor; K, B, C and D are coefficients that are used to enable the output light intensity of the ambient light sensor to be close to a light intensity perceived by human eyes; and MAX is an operation symbol for obtaining a maximum value; and wherein the adjusting device is configured to adjust a K value in the output light intensity calculation formula according to different parameter ratios Cdata Irdata to enable the output light intensities Lux of the ambient light sensor to be consistent for different parameter ratios Cdata Irdata .
The electronic product utilizes the Lux = K * MAX[(Cdata - B * Irdata), (C * Cdata - D * Irdata), 0] formula for output light intensity calculation. The K, B, C, and D coefficients help match the output to human perception. The adjusting device varies the K value based on the Cdata/Irdata ratio to maintain consistent Lux output across different color temperatures. This ensures the display brightness adjusts effectively to ambient light.
12. The electronic product according to claim 11 , wherein the adjusting device is configured to adjust the K value in the output light intensity calculation formula according to the different parameter ratios Cdata Irdata to enable the output light intensities of the ambient light sensor to be equal to intensities of the light received by the ambient light sensor for the parameter ratios Cdata Irdata .
The electronic product's ambient light sensor precisely adjusts the K value so that the sensor's output matches the intensity of the received light across different Cdata/Irdata ratios. This precise calibration ensures that the display brightness adapts accurately to perceived ambient light levels, providing optimal viewing comfort.
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December 24, 2014
October 3, 2017
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